Room EQ Wizard: REW Room Measurement Tutorial

[@GIKAcousticsLLC]

Not sure why not but RT60 is generally only used for larger rooms. You want to view the decay times under waterfall graphs. If you look at our articles page you will see a write we did on understanding decay times.

[@0815Bob]

Very nice! - straight to the point, no chit chat. I really appreciate that!

[@JackMcDonnell91]

bloody hell this is good knowledge. just picked up REW for the first time. love it!

[@MrJdsenior]

My take as an engineer, lifetime 'audiophile', etc on this video utilizing a school or review type grading system (more or less). Fantastic ... to start there is no painful 1st 3rd of total vid time introduction including mostly useless BS and ramblings like at least 90% on YT = +50 points (and thank you!) Concise, well written (well thought out), completely applicable/useful information that is well presented, execution wise. = +50 points. I had a few college profs, bosses, etc. that could do this readily, but very few, actually. Music, meh, not needed, mildly irritating = -10 points (kinda get it, being an audio tutorial, and I understand so called copyright infringement). Price and taking time to present this, well obviously +10,000 points, but sticking to bell curve reality and typically 100 max = +30 points Yeah, you ended up with a 120 (if it's wrong in the pinhead math, don't care. after all, I only got through DE, and then the usual matrix, transformational, etc 'practical' use) out of 100, but I'm considering extra credit for caring. I hope you are happy with your grade, you deserve it. :-) And REW? Open source KILLER S/W! Not surprising. I have a few mods I'd like to add, but I HATE programming. Now if I could just get the EQ part working, with the appropriate band pass filters. Also, a PhD in audio engineering would probably be beneficial...as in, one example, what the hell is clarity, something to do with total distortion/room degradation? Yeah, I'll look it up/research it, and about three other terms and functions. One thing getting this SW did was make me realize how little speaker designers probably actually use their EARS for feedback. Probably a good thing, if they are anything like mine.

[@tammaimanyakjang]

Best tutorial i came across

[@Noone-of-your-Business]

Well, that's all nice and dandy, but is there a way of auto-correcting the measured frequency response?

[@ExacoMvm]

Mic usually has own freq response, then speakers/headphones has own response, so how do you even measure DAC then?

[@Jabesh_Dta_Music]

so can i use my SE X1A for mesurments or is that not possible ?

[@bretmuldner]

Great vid! Easy to understand and well thought out! Need more people like you teaching and making videos.

[@HammyTechnoid]

He mentions pointing the mic at the ceiling, but I've seen some mics that are meant to be pointing at the speakers. The readings would be seriously different.

[@Mineiro426]

Can anyone tell me which are the three or four words he says between "rather" and "test files" from 08:17 to 08:19? English is not my first language and I'm having trouble to understand what he's saying.

[@zpurpz]

Sick of songs sounding way different in my car . I'm def doing this !!

[@GIKAcousticsLLC]

Some like his voice others don't. Hope the info helped you though. ;)

[@mmmmmilash8850]

3:21 - do I still need to have In and Out connected for this?

[@Bacardi1337]

so for the calibration itself, there is only the computer and the preamp connected to create the loop? so no mic or speaker or anything?

[@240z4u]

Great video, you made the software a lot less intimidating!

[@50LightSabersInAPack]

6:25 why is there this ripple effect on the FR? It happens to me too when I measure my FR.. Surely it's a bad thing?

[@pauqbeats]

so then.. how do i then make my speakers better?

[@viorelneculaiasa5222]

So, after I've made the measurement from the "sweet spot", the program will correct my room freq.deficiency? Is there any corrected eq wich I can aplly on my master fader like a plugin? Or should I send the results to somebody else to tells me what's netxt?

[@Trdat]

Is the loopback connection as simple as connecting left and right RCA of the Main of the external soundcard into the left and right auxillary of the amplifier? Why I ask is cause i read that the right(Main) of the external soundcard needs to split into the auxillary's of the left and right in the amplifier...

Great video, but... what I don't understand no matter how hard I try is - this software disregards two important frequency characteristics/distortions - the mic and the sound source. Are they not important in case I wanted to improve acoustic treatment of my room with REW? To ask more precisely - how would you deal with sub-50Hz if your audio monitors are 5" ones (not capable of reproducing those freqs accurately)? I hope you see my point and help me out if you can, keep up the good work. =)

[@spiroutha]

Hi!great video mate!should i use phantom power during loopback connection?

[@Dozerbeatz]

What is your thought on the ECM8000 being free feild, and needing to be pointed at speakers, instead of up toward ceiling, for measuring? Saw a thread at gearslutz that was sort of flip floppy on recommendation. Great job on video. Liked!

[@TokyoUnderworld]

i got the focusrite itrack solo microphone, will this do the job?

[@jdm724]

Can you use it to check what low frequency movies have? Like how low some movies can go?

[@aaronjohnson4573]

how do you get 5.1 to show up? mine only shows 2 channel recording.

[@byus6928]

I am having no luck trying to do this. All I ever get is the peak impulse is not where it's posed to be..in using an apollo 8 bf interface. Like the only one there's no tutorials for.

[@RodrigoMateo2]

Somehow its measuring around 162 db spl, and 110db as floor when completely silent... what am i doing wrong? :S

[@Dailyscriptures2]

is it a must to use a measurement mic? can a condenser mic like AT 2020 be used for such measurement?

[@HarmonyxRuLz]

My mic keeps clipping every time I try to get it around -18db, also nothing would calibrate for me. Sadly this software and measurement mic feel useless to me right now. Does anyone have any advice? I'm using the Peavey PVR1 microphone and a Clarett 8 Pre x for an interface. Thanks.

[@babatunda1849]

can this software be used for a church setting ?

[@MikeeB93]

Glenn Kuras is a BOSS

[@GIKAcousticsLLC]

You would need the cal file but honestly I would not worry to much about it. Most mics are flat enough.

[@doctortono]

How do you do IMPEDANCE MEASUREMENTS in REW?

[@matrixate]

He doesn't show the calibration curve. I could see that it was not consistent with the manual as it seemed to have a downward oscillation.

[@sqteamturkey2293]

Amd can i use dayton imm6 microphone?

[@brucetouzel6484]

can it generate white/pink noise ?

[@frejgun]

can i use a u-87

[@xburgos1]

Can I use an iPad to run program.?

[@Tim2000-h5k]

Does it work with every soundcard?

[@klimpen05]

Would you recommend the superlux ecm999 as a measurment mic? Do you need to calibrate the mics freq response? thanks for the video!

[@christsanjoures]

yup, it's the same exact OEM product as the Behringer, Audix, Nady, etc low end offerings.

[@GIKAcousticsLLC]

I have never used the ecm999 but don't see any reason why it would not work. You might want to do a search on google to get some reviews.

[@DwarfElvishDiplomacy]

How can i up the input value ?

[@CrisValk]

HI very useful vid! Two questions:To calibrate the soundcard you've just said that you may have to raise the output level OR the input gain...why can't I use both if with only one of those I can't reach the closest signal? And...with the newer version there's a Reference Timing with the add of a second loopback...what is that for?is it necessary? Thanks!

[@riktascale4]

He does not explain properly how to adjust the input level??

[@g00thier]

it doesn't see the input from my mic, but the mic certainly works cause I can generate feedback with it...

[@aeroBaha87]

Hi Glenn Kuras, thank you for the video. I have one question. I am trying to calibrate my mic to ambient noise. I have a cheap mic and my laptop, nothing else. How to calibrate? Could you explain shortly? thanks

[@thechodfather]

Excellent! And thankyou for sharing

[@tieruilu9178]

Good Teacher

[@eggbass]

Does this still apply to v5.19?

[@gonzodrums]

Glenn - Thanks for the video. I'm using a Dell laptop, with a MiniDSP UMIK-1, so basically I'm using only the output of the sound card (3.5mm output connector). How do I calibrate the levels of my soundcard if I don't have an analog input in my laptop? I can't just loop it as you show in your video. Is it really necesary to do that process in my case? Thanks for your help. Gonzalo

[@Polyrhythmicbeast]

You could but I wouldn't. I would try to get ahold of a condenser or measurement mic :)

[@nailay7]

my goodness the calibration sweep is so fucking loud when i do it but a little window pops up and says the reading is to quiet :(

[@junglestar]

Can I use an SM57 Mic ?

[@KennyTew2]

This is great, thanks a lot.

[@VanDamMetallica]

Is REW appropriate for help in ringing out mics? I want to eliminate vocal mic feedback problems I have in a rehearsal room. I have an audio interface I can use with my vocal mics.

[@davidpuentesb7706]

and EQ?

[@tonchecker]

The ECM 8000 is NOT A FLAT MICROPHONE !!!

[@malcolmgoldie]

Good tutorial but if ever a bit of software needed a simplified version it is REW

[@MrJdsenior]

Nope. With simplification comes limited usefulness, MHO. Besides, it is not the SW that is the real hurdle, but rather the practical implementation of it to remotely optimized outcomes. I suspect an audio engineer could flatten response curves on a given system that would make mine look like the Himalayas. The SW is cake compared to the knowledge needed to use it correctly. I would actually make suggestions for expansion of the capabilities in several areas. I just don't want to program them (and I suck at it anyway).

[@babatunda1849]

can you use this on a larger scale like in a church setting ?

[@jinzo664]

For some reason, during calibration I get 'The highest in the measured input is just -84dBFS" which is too low. DAE get this issue?

[@Polyrhythmicbeast]

Anybody with a mac and/or an interface with more than 2 inputs might greatly benefit from this if your having problems with REW input/output: Go to REW thread in the forums at hometheatershack

[@ChristianRuschOfficial]

It's as if David Caruso and Christopher Walken had a child.

[@nailay7]

If your get a really jumbled response on the graph dose that mean that the acoustics are bad haha

[@GIKAcousticsLLC]

lol.. thanks

[@kenwebster5053]

This is not very helpful to me. I am looking for an affordable repeatable way to efficiently EQ a PA system. This tutorial tells me how to calibrate the sound card but doesn't cover calibrating the measurement mic. Cheap measurement mics are not flat, they generally come with a calibration file. I would not trust the Behringer as that brand is about the very bottom end of the market and it isn't clear if their mics are calibrated by individual test or just as a model. I suspect the latter. Some cheap measurement mics are a long way off the supplied calibrations. So I want to know which other mics I can calibrate for. It is unclear if this helps me to EQ post mixer with an analogue mixer or if it just EQs the computer output which would be totally pointless and useless to me because I deal with many different sources and my need is to the EQ the system a whole, not just a computer. The tutorial fails to answer my most important questions. I get that it's a user tutorial but answers to these questions don't seem to be available anywhere. I am not going to even purchase this kind of produce unless there are answers. Without these answers, I am not ever going to need this tutorial.

[@kellyyoung6165]

wtfr

[@bigfishpondhome1]

Your reply is annoying.

[@igb6410]

For some reason only my right speaker is playing back audio, any idea on how to fix this? I'm using a scarlett 18i8

[@GIKAcousticsLLC]

I have never used the ecm999 but don't see any reason why it would not work. You might want to do a search on google to get some reviews.